[gnome-font-viewer] build: specify meson 0.50.0 requirement

[Cosimo Cecchi <cosimoc src gnome org>]

commit 50fad73bc849db8ba24f2d637cd9a849a8432124
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Thu Jul 4 09:54:53 2019 -0700

    build: specify meson 0.50.0 requirement
    
    We use features that are available starting that version.

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index ebac1ea..e239593 100644
--- a/meson.build
+++ b/meson.build
@@ -1,7 +1,7 @@
 project('gnome-font-viewer', 'c',
         version: '3.32.0',
         license: 'GPLv2+',
-        meson_version: '>= 0.40.1',
+        meson_version: '>= 0.50.0',
 )
 
 cc = meson.get_compiler('c')